RICS Level 3 Building Survey in AB55

The Level 3 Building Survey, formerly known as a Full Structural Survey, is the most thorough inspection we carry out. It goes far beyond a standard homebuyer report, looking at the construction, materials and condition of every accessible part of the building. For a property in AB55, that means we investigate details a simpler survey may skim over or miss altogether.

Our inspection covers the following areas in full:

• Roof structure and coverings - slate condition, timber frame integrity, flashings, ridge tiles and valley gutters
• External walls - stone masonry, pointing condition, render and harling, signs of structural movement or cracking
• Internal walls, floors and ceilings - checked for deflection, cracking, dampness and evidence of alteration
• Timber elements - floor joists, lintels, purlins and rafters assessed for rot, woodworm and structural adequacy
• Dampness - rising damp, penetrating damp and condensation investigated using moisture meters and visual inspection
• Windows and doors - condition, draught-proofing, glazing type and any signs of frame decay
• Services overview - heating system, plumbing, electrics and drainage assessed at a general level
• External grounds - boundaries, outbuildings, drainage, paths, drives and any retaining structures

Each element is given a condition rating from 1, satisfactory and no action needed, to 3, serious defects requiring urgent repair. We also set out repair recommendations, estimated costs where possible, and the likely consequences of leaving problems alone. That gives you a clearer basis for the purchase and any work that may follow.

Aberdeenshire's building tradition leans heavily on local stone, and properties throughout AB55 reflect that heritage. Granite is the region's signature material, extremely durable, though it brings its own challenges for building surveyors.

Granite walls are usually built as solid masonry, often two skins of stone with a rubble core. The stones themselves rarely break down, but the mortar joints are the weak point. Lime mortar, used in most pre-1940 buildings, weathers gradually and can let water into the wall. We check every accessible elevation for mortar breakdown, water tracking and any movement in the stonework.

Sandstone buildings are also found in the area, especially in town centres. It is softer and more porous than granite, which makes it vulnerable to weathering, frost damage and salt crystallisation. Surface erosion, spalling, where the face of the stone flakes away, and unsuitable cement repointing are common issues we pick up during inspections.

Harling, the traditional Scottish roughcast render, protects many stone walls across AB55. It works well as weather protection, but it can hide trouble beneath. Cracking, bulging or hollow patches in harled walls may point to masonry failure, moisture ingress or even structural movement that is not obvious from the outside. Our surveyors test these areas carefully to see what is happening below the surface.

Older roof structures typically use natural slate on a timber frame. How long the slate lasts depends on the quality of the original material and the fixings. Many older roofs were fixed with iron nails that rust over time, which can cause slates to slip. We assess the overall roof condition, identify areas of concern and estimate remaining lifespan where possible.

Timber plays a structural role in almost every property across AB55, from floor joists and lintels to roof trusses and purlins. In older buildings, timber elements can be among the most vulnerable parts, and identifying decay early is one of the main reasons to commission a Level 3 survey.

Wet rot develops in timber exposed to persistent moisture. In AB55 properties, common locations include ground-floor joists near damp walls, window sills and frames, and timber lintels above openings. Wet rot weakens timber and, if left untreated, can lead to structural failure in load-bearing members.

Dry rot is less common, but far more destructive. It can spread through masonry, behind plaster and into areas that are difficult to inspect. The fruiting body and the distinctive musty smell are the most recognisable signs, but by the time they appear the fungus has often already caused extensive damage. Our surveyors look for conditions that favour dry rot, warm, unventilated spaces with a moisture source, and inspect any suspicious areas.

Woodworm, or furniture beetle, affects many older properties. Light infestations in non-structural timber are often of limited concern, but heavy attack in floor joists or roof timbers can compromise structural integrity. We look for active infestation by checking for fresh flight holes and bore dust, and advise on treatment where needed.

Roof structures in older AB55 homes deserve particular attention. Natural slate on a timber frame is the traditional construction, and the condition of both elements determines the roof's remaining serviceable life. Rusted iron nail fixings, sagging ridges, broken or slipped slates, and deteriorated sarking boards are all issues we regularly encounter and report on in detail.